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| 论文编号: |
122214O120130244 |
| 第一作者所在部门: |
101组 |
| 中文论文题目: |
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| 英文论文题目: |
Hydrodynamic characteristics of multi-stage conversion fluidized bed (MFB)
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| 论文题目英文: |
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| 作者: |
王志雨
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| 论文出处: |
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| 刊物名称: |
Fuel Processing Technology
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| 年: |
2013
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| 卷: |
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| 期: |
115 |
| 页: |
99-109 |
| 联系作者: |
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| 收录类别: |
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| 影响因子: |
2.816
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| 摘要: |
A novel multi-stage conversion fluidized bed (MFB) gasifier which coupled an ash agglomerated fluidized bed
gasifier (AFB, coldmodel as jetting fluidized bed, JFB)with a riser has been introduced and studied. The newgasifier
aimed to independently control solid and gas retention times and to achieve high solids concentration,
whichwas essential to raise the coal gasification efficiency. The hydrodynamic characteristics ofMFB were investigated
in a cold model apparatus (JFB 1.5 m in height and 0.3 m inner diameter, riser 8 m in height and 0.15 m
inner diameter) with silica gel particles. Experimental results showed that under suitable operating conditions,
MFB could successfully couple JFB with a riser, in which the solids that entered could form three-level
step-by-step supplement entrainment and multi-flow regimes formed. A solid distribution ratio was proposed
to quantify increased-solid distribution relationship between JFB and the riser, and the transition velocity of
the MFB, uM,tr, was defined and its physical significance was explained. Finally, a qualitative and quantitative
“phase diagram” describing the existence of different flow regimes ofMFB as a function of the dimensionless parameters
Gs/(ρpvt) and Reynolds was proposed and MFB ought to be operated in JF-FF flow regime. This phase
diagram was indispensable for the design, operation and scale-up of the MFB gasifier. |
| 英文摘要: |
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| 外单位作者单位: |
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| 备注: |
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